RNGdle EP and Rarity: Rolls vs Individual Badges

Two different questions

The original About page defines number rarity as a roll’s total EP rank among possible rolls. It defines badge rarity by the chance that a particular badge appears. Keep the labels separate when reading a result.

Overall roll label	Position described by the original site
Trash	Bottom 1%
Common	Bottom 50%
Uncommon	Top 50–25%
Rare	Top 25–10%
Epic	Top 10–5%
Anomaly	Top 5–1%
Mythic	Top 1%

The original wording for Trash and Common overlaps at the bottom. It does not publish every boundary convention on this page. We preserve the published labels instead of inventing a precise classification algorithm.

Individual badge label	Occurrence probability on the original About page
Common	More than 10% of rolls
Uncommon	1–10%
Rare	0.1–1%
Epic	0.01–0.1%
Anomaly	0.001–0.01%
Mythic	Less than 0.001%

A concrete example

The original Quarter-Century badge page describes a number ending in 25, gives the badge a Rare label and lists 10,000 EP and 1.00% probability. That is a badge fact. It does not by itself prove that every roll earning it receives an overall Rare label; the whole roll uses total EP.

Every exact integer in the 0–1,000,000 range may be individually specific, but badge probabilities ask about a pattern shared by many integers. That is why “my exact number is unique” and “my badge is common” can coexist. Do not treat an independently made rarity score on another site as original RNGdle EP; see daily vs unlimited.

Sources checked September 24, 2026: official About, official Quarter-Century badge. The full internal EP calculation has not been independently verified here.